Sam Querrey defeated Andreas Seppi 6-1 7-5 in the Monte Carlo Masters round of 32 on clay. The upset overturned the form book — Andreas Seppi came in leading the head-to-head 5–1, defending last year's round of 32. Sam Querrey narrowed the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-08-27 | US Open | R128 | hard | Andreas Seppi | 6-7(6) 6-4 6-2 2-1 RET |
| 2014-03-06 | Indian Wells Masters | R64 | hard | Andreas Seppi | 4-6 7-6(3) 6-3 |
| 2012-10-01 | Beijing | R16 | hard | Sam Querrey | 6-1 6-4 |
| 2009-05-10 | Madrid Masters | R32 | clay | Andreas Seppi | 6-3 4-6 6-4 |
| 2009-04-27 | Rome Masters | R64 | clay | Andreas Seppi | 3-6 6-4 6-3 |
| 2007-10-28 | Paris Masters | R64 | hard | Andreas Seppi | 5-7 6-1 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About